![]() ![]() A series of progressively wider lines across a lane indicates a speed hump ahead. A hollow triangle indicates a yield ahead. A letter X with a letter R on each side indicates a highway-rail grade crossing ahead. ![]() Pavement markings are also used to alert users to potentially hazardous conditions ahead. A row of solid triangles indicates that the road user must yield. ![]() Arrows show required or permitted movements at intersections. A bicycle indicates a lane reserved for bicyclists. A diamond indicates a lane reserved for use by high-occupancy vehicles. Symbols are used to indicate permitted lane usages. A dashed white line indicates that lane changes are allowed. A single white line indicates that lane changes are discouraged. A double white line indicates that lane changes are prohibited. White lines separate lanes for which travel is in the same direction. A dashed yellow line indicates that passing is allowed. A solid yellow line indicates that passing is prohibited. Drivers should stay to the right of yellow lines. Yellow lines separate traffic flowing in opposite directions. They indicate which part of the road to use, provide information about conditions ahead, and indicate where passing is allowed. Pavement markings are used to convey messages to roadway users. PDF files can be viewed with the Acrobat® Reader® Preface ![]()
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